//
//  NSString+Ext.m
//  WDPubLib
//
//  Created by wujianrong on 16/4/9.
//  Copyright © 2016年 wanda. All rights reserved.
//

#import "NSString+wdice.h"
#import <CommonCrypto/CommonDigest.h>

@implementation NSString(wdice)


- (NSString *)iceMd5 {
    const char *cStr = [self UTF8String];
    unsigned char result[16];
    CC_MD5( cStr, (unsigned int)strlen(cStr), result ); // This is the md5 call
    return [NSString stringWithFormat:
            @"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
            result[0], result[1], result[2], result[3],
            result[4], result[5], result[6], result[7],
            result[8], result[9], result[10], result[11],
            result[12], result[13], result[14], result[15]
            ];
}


+(NSString*)iceSafeString:(NSString*)string
{
    if (string == nil) {
        return @"";
    }
    if (![string isKindOfClass:[NSString class]]) {
        return  @"";
    }
    return string;
    
}

- (NSDictionary *)parseUrlQuery {
    if ([NSString iceSafeString:self].length == 0) {
        return nil;
    }
    NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
    NSArray *pairs = [self componentsSeparatedByString:@"&"];
    
    for (NSString *pair in pairs) {
        NSArray *elements = [pair componentsSeparatedByString:@"="];
        
        if ([elements count] <= 1) {
            continue;
        }
        
        NSString *key = [[elements objectAtIndex:0] stringByRemovingPercentEncoding];
        NSString *val = [[elements objectAtIndex:1] stringByRemovingPercentEncoding];
        
        [dict setObject:val forKey:key];
    }
    return dict;
}

@end
